export default {
  addCart(context, payload) {
    return new Promise((resolve,reject) => {
      // payload新添加的商品
      let oldProduct = context.state.cartList.find(item => item.iid === payload.iid)

      // 判断oldProduct
      if (oldProduct) {
        context.commit('addCounter',oldProduct)
        resolve('当前的商品数量+1')
      } else {
        context.commit('addCart',payload)
        resolve('已添加到购物车')
      }
    })
  }
}
